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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / media / platform / m2m-deinterlace.c
blob6bb86b581a34e43f0fe34cc44f5a2132b1589e7b
1 /*
2 * V4L2 deinterlacing support.
3 *
4 * Copyright (c) 2012 Vista Silicon S.L.
5 * Javier Martin <javier.martin@vista-silicon.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the
10 * License, or (at your option) any later version
11 */
12
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/interrupt.h>
16 #include <linux/dmaengine.h>
17 #include <linux/platform_device.h>
18
19 #include <media/v4l2-mem2mem.h>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-ioctl.h>
22 #include <media/videobuf2-dma-contig.h>
23
24 #define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace"
25
26 MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine");
27 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
28 MODULE_LICENSE("GPL");
29 MODULE_VERSION("0.0.1");
30
31 static bool debug;
32 module_param(debug, bool, 0644);
33
34 /* Flags that indicate a format can be used for capture/output */
35 #define MEM2MEM_CAPTURE (1 << 0)
36 #define MEM2MEM_OUTPUT (1 << 1)
37
38 #define MEM2MEM_NAME "m2m-deinterlace"
39
40 #define dprintk(dev, fmt, arg...) \
41 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
42
43 struct deinterlace_fmt {
44 char *name;
45 u32 fourcc;
46 /* Types the format can be used for */
47 u32 types;
48 };
49
50 static struct deinterlace_fmt formats[] = {
51 {
52 .name = "YUV 4:2:0 Planar",
53 .fourcc = V4L2_PIX_FMT_YUV420,
54 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
55 },
56 {
57 .name = "YUYV 4:2:2",
58 .fourcc = V4L2_PIX_FMT_YUYV,
59 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
60 },
61 };
62
63 #define NUM_FORMATS ARRAY_SIZE(formats)
64
65 /* Per-queue, driver-specific private data */
66 struct deinterlace_q_data {
67 unsigned int width;
68 unsigned int height;
69 unsigned int sizeimage;
70 struct deinterlace_fmt *fmt;
71 enum v4l2_field field;
72 };
73
74 enum {
75 V4L2_M2M_SRC = 0,
76 V4L2_M2M_DST = 1,
77 };
78
79 enum {
80 YUV420_DMA_Y_ODD,
81 YUV420_DMA_Y_EVEN,
82 YUV420_DMA_U_ODD,
83 YUV420_DMA_U_EVEN,
84 YUV420_DMA_V_ODD,
85 YUV420_DMA_V_EVEN,
86 YUV420_DMA_Y_ODD_DOUBLING,
87 YUV420_DMA_U_ODD_DOUBLING,
88 YUV420_DMA_V_ODD_DOUBLING,
89 YUYV_DMA_ODD,
90 YUYV_DMA_EVEN,
91 YUYV_DMA_EVEN_DOUBLING,
92 };
93
94 /* Source and destination queue data */
95 static struct deinterlace_q_data q_data[2];
96
97 static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type)
98 {
99 switch (type) {
100 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
101 return &q_data[V4L2_M2M_SRC];
102 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
103 return &q_data[V4L2_M2M_DST];
104 default:
105 BUG();
106 }
107 return NULL;
108 }
109
110 static struct deinterlace_fmt *find_format(struct v4l2_format *f)
111 {
112 struct deinterlace_fmt *fmt;
113 unsigned int k;
114
115 for (k = 0; k < NUM_FORMATS; k++) {
116 fmt = &formats[k];
117 if ((fmt->types & f->type) &&
118 (fmt->fourcc == f->fmt.pix.pixelformat))
119 break;
120 }
121
122 if (k == NUM_FORMATS)
123 return NULL;
124
125 return &formats[k];
126 }
127
128 struct deinterlace_dev {
129 struct v4l2_device v4l2_dev;
130 struct video_device *vfd;
131
132 atomic_t busy;
133 struct mutex dev_mutex;
134 spinlock_t irqlock;
135
136 struct dma_chan *dma_chan;
137
138 struct v4l2_m2m_dev *m2m_dev;
139 struct vb2_alloc_ctx *alloc_ctx;
140 };
141
142 struct deinterlace_ctx {
143 struct deinterlace_dev *dev;
144
145 /* Abort requested by m2m */
146 int aborting;
147 enum v4l2_colorspace colorspace;
148 dma_cookie_t cookie;
149 struct v4l2_m2m_ctx *m2m_ctx;
150 struct dma_interleaved_template *xt;
151 };
152
153 /*
154 * mem2mem callbacks
155 */
156 static int deinterlace_job_ready(void *priv)
157 {
158 struct deinterlace_ctx *ctx = priv;
159 struct deinterlace_dev *pcdev = ctx->dev;
160
161 if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0)
162 && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0)
163 && (atomic_read(&ctx->dev->busy) == 0)) {
164 dprintk(pcdev, "Task ready\n");
165 return 1;
166 }
167
168 dprintk(pcdev, "Task not ready to run\n");
169
170 return 0;
171 }
172
173 static void deinterlace_job_abort(void *priv)
174 {
175 struct deinterlace_ctx *ctx = priv;
176 struct deinterlace_dev *pcdev = ctx->dev;
177
178 ctx->aborting = 1;
179
180 dprintk(pcdev, "Aborting task\n");
181
182 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
183 }
184
185 static void deinterlace_lock(void *priv)
186 {
187 struct deinterlace_ctx *ctx = priv;
188 struct deinterlace_dev *pcdev = ctx->dev;
189 mutex_lock(&pcdev->dev_mutex);
190 }
191
192 static void deinterlace_unlock(void *priv)
193 {
194 struct deinterlace_ctx *ctx = priv;
195 struct deinterlace_dev *pcdev = ctx->dev;
196 mutex_unlock(&pcdev->dev_mutex);
197 }
198
199 static void dma_callback(void *data)
200 {
201 struct deinterlace_ctx *curr_ctx = data;
202 struct deinterlace_dev *pcdev = curr_ctx->dev;
203 struct vb2_buffer *src_vb, *dst_vb;
204
205 atomic_set(&pcdev->busy, 0);
206
207 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
208 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
209
210 src_vb->v4l2_buf.timestamp = dst_vb->v4l2_buf.timestamp;
211 src_vb->v4l2_buf.timecode = dst_vb->v4l2_buf.timecode;
212
213 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
214 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
215
216 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
217
218 dprintk(pcdev, "dma transfers completed.\n");
219 }
220
221 static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
222 int do_callback)
223 {
224 struct deinterlace_q_data *s_q_data;
225 struct vb2_buffer *src_buf, *dst_buf;
226 struct deinterlace_dev *pcdev = ctx->dev;
227 struct dma_chan *chan = pcdev->dma_chan;
228 struct dma_device *dmadev = chan->device;
229 struct dma_async_tx_descriptor *tx;
230 unsigned int s_width, s_height;
231 unsigned int s_size;
232 dma_addr_t p_in, p_out;
233 enum dma_ctrl_flags flags;
234
235 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
236 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
237
238 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
239 s_width = s_q_data->width;
240 s_height = s_q_data->height;
241 s_size = s_width * s_height;
242
243 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0);
244 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0);
245 if (!p_in || !p_out) {
246 v4l2_err(&pcdev->v4l2_dev,
247 "Acquiring kernel pointers to buffers failed\n");
248 return;
249 }
250
251 switch (op) {
252 case YUV420_DMA_Y_ODD:
253 ctx->xt->numf = s_height / 2;
254 ctx->xt->sgl[0].size = s_width;
255 ctx->xt->sgl[0].icg = s_width;
256 ctx->xt->src_start = p_in;
257 ctx->xt->dst_start = p_out;
258 break;
259 case YUV420_DMA_Y_EVEN:
260 ctx->xt->numf = s_height / 2;
261 ctx->xt->sgl[0].size = s_width;
262 ctx->xt->sgl[0].icg = s_width;
263 ctx->xt->src_start = p_in + s_size / 2;
264 ctx->xt->dst_start = p_out + s_width;
265 break;
266 case YUV420_DMA_U_ODD:
267 ctx->xt->numf = s_height / 4;
268 ctx->xt->sgl[0].size = s_width / 2;
269 ctx->xt->sgl[0].icg = s_width / 2;
270 ctx->xt->src_start = p_in + s_size;
271 ctx->xt->dst_start = p_out + s_size;
272 break;
273 case YUV420_DMA_U_EVEN:
274 ctx->xt->numf = s_height / 4;
275 ctx->xt->sgl[0].size = s_width / 2;
276 ctx->xt->sgl[0].icg = s_width / 2;
277 ctx->xt->src_start = p_in + (9 * s_size) / 8;
278 ctx->xt->dst_start = p_out + s_size + s_width / 2;
279 break;
280 case YUV420_DMA_V_ODD:
281 ctx->xt->numf = s_height / 4;
282 ctx->xt->sgl[0].size = s_width / 2;
283 ctx->xt->sgl[0].icg = s_width / 2;
284 ctx->xt->src_start = p_in + (5 * s_size) / 4;
285 ctx->xt->dst_start = p_out + (5 * s_size) / 4;
286 break;
287 case YUV420_DMA_V_EVEN:
288 ctx->xt->numf = s_height / 4;
289 ctx->xt->sgl[0].size = s_width / 2;
290 ctx->xt->sgl[0].icg = s_width / 2;
291 ctx->xt->src_start = p_in + (11 * s_size) / 8;
292 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
293 break;
294 case YUV420_DMA_Y_ODD_DOUBLING:
295 ctx->xt->numf = s_height / 2;
296 ctx->xt->sgl[0].size = s_width;
297 ctx->xt->sgl[0].icg = s_width;
298 ctx->xt->src_start = p_in;
299 ctx->xt->dst_start = p_out + s_width;
300 break;
301 case YUV420_DMA_U_ODD_DOUBLING:
302 ctx->xt->numf = s_height / 4;
303 ctx->xt->sgl[0].size = s_width / 2;
304 ctx->xt->sgl[0].icg = s_width / 2;
305 ctx->xt->src_start = p_in + s_size;
306 ctx->xt->dst_start = p_out + s_size + s_width / 2;
307 break;
308 case YUV420_DMA_V_ODD_DOUBLING:
309 ctx->xt->numf = s_height / 4;
310 ctx->xt->sgl[0].size = s_width / 2;
311 ctx->xt->sgl[0].icg = s_width / 2;
312 ctx->xt->src_start = p_in + (5 * s_size) / 4;
313 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
314 break;
315 case YUYV_DMA_ODD:
316 ctx->xt->numf = s_height / 2;
317 ctx->xt->sgl[0].size = s_width * 2;
318 ctx->xt->sgl[0].icg = s_width * 2;
319 ctx->xt->src_start = p_in;
320 ctx->xt->dst_start = p_out;
321 break;
322 case YUYV_DMA_EVEN:
323 ctx->xt->numf = s_height / 2;
324 ctx->xt->sgl[0].size = s_width * 2;
325 ctx->xt->sgl[0].icg = s_width * 2;
326 ctx->xt->src_start = p_in + s_size;
327 ctx->xt->dst_start = p_out + s_width * 2;
328 break;
329 case YUYV_DMA_EVEN_DOUBLING:
330 default:
331 ctx->xt->numf = s_height / 2;
332 ctx->xt->sgl[0].size = s_width * 2;
333 ctx->xt->sgl[0].icg = s_width * 2;
334 ctx->xt->src_start = p_in;
335 ctx->xt->dst_start = p_out + s_width * 2;
336 break;
337 }
338
339 /* Common parameters for al transfers */
340 ctx->xt->frame_size = 1;
341 ctx->xt->dir = DMA_MEM_TO_MEM;
342 ctx->xt->src_sgl = false;
343 ctx->xt->dst_sgl = true;
344 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
345
346 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
347 if (tx == NULL) {
348 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
349 return;
350 }
351
352 if (do_callback) {
353 tx->callback = dma_callback;
354 tx->callback_param = ctx;
355 }
356
357 ctx->cookie = dmaengine_submit(tx);
358 if (dma_submit_error(ctx->cookie)) {
359 v4l2_warn(&pcdev->v4l2_dev,
360 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",
361 ctx->cookie, (unsigned)p_in, (unsigned)p_out,
362 s_size * 3/2);
363 return;
364 }
365
366 dma_async_issue_pending(chan);
367 }
368
369 static void deinterlace_device_run(void *priv)
370 {
371 struct deinterlace_ctx *ctx = priv;
372 struct deinterlace_q_data *dst_q_data;
373
374 atomic_set(&ctx->dev->busy, 1);
375
376 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
377
378 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
379
380 /*
381 * 4 possible field conversions are possible at the moment:
382 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB:
383 * two separate fields in the same input buffer are interlaced
384 * in the output buffer using weaving. Top field comes first.
385 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE:
386 * top field from the input buffer is copied to the output buffer
387 * using line doubling. Bottom field from the input buffer is discarded.
388 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT:
389 * two separate fields in the same input buffer are interlaced
390 * in the output buffer using weaving. Bottom field comes first.
391 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE:
392 * bottom field from the input buffer is copied to the output buffer
393 * using line doubling. Top field from the input buffer is discarded.
394 */
395 switch (dst_q_data->fmt->fourcc) {
396 case V4L2_PIX_FMT_YUV420:
397 switch (dst_q_data->field) {
398 case V4L2_FIELD_INTERLACED_TB:
399 case V4L2_FIELD_INTERLACED_BT:
400 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
401 __func__);
402 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
403 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
404 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
405 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
406 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
407 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
408 break;
409 case V4L2_FIELD_NONE:
410 default:
411 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",
412 __func__);
413 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
414 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);
415 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
416 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);
417 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
418 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);
419 break;
420 }
421 break;
422 case V4L2_PIX_FMT_YUYV:
423 default:
424 switch (dst_q_data->field) {
425 case V4L2_FIELD_INTERLACED_TB:
426 case V4L2_FIELD_INTERLACED_BT:
427 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
428 __func__);
429 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
430 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
431 break;
432 case V4L2_FIELD_NONE:
433 default:
434 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",
435 __func__);
436 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
437 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
438 break;
439 }
440 break;
441 }
442
443 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
444 }
445
446 /*
447 * video ioctls
448 */
449 static int vidioc_querycap(struct file *file, void *priv,
450 struct v4l2_capability *cap)
451 {
452 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
453 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
454 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card));
455 /*
456 * This is only a mem-to-mem video device. The capture and output
457 * device capability flags are left only for backward compatibility
458 * and are scheduled for removal.
459 */
460 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
461 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
462 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
463
464 return 0;
465 }
466
467 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
468 {
469 int i, num;
470 struct deinterlace_fmt *fmt;
471
472 num = 0;
473
474 for (i = 0; i < NUM_FORMATS; ++i) {
475 if (formats[i].types & type) {
476 /* index-th format of type type found ? */
477 if (num == f->index)
478 break;
479 /* Correct type but haven't reached our index yet,
480 * just increment per-type index */
481 ++num;
482 }
483 }
484
485 if (i < NUM_FORMATS) {
486 /* Format found */
487 fmt = &formats[i];
488 strlcpy(f->description, fmt->name, sizeof(f->description));
489 f->pixelformat = fmt->fourcc;
490 return 0;
491 }
492
493 /* Format not found */
494 return -EINVAL;
495 }
496
497 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
498 struct v4l2_fmtdesc *f)
499 {
500 return enum_fmt(f, MEM2MEM_CAPTURE);
501 }
502
503 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
504 struct v4l2_fmtdesc *f)
505 {
506 return enum_fmt(f, MEM2MEM_OUTPUT);
507 }
508
509 static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
510 {
511 struct vb2_queue *vq;
512 struct deinterlace_q_data *q_data;
513
514 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
515 if (!vq)
516 return -EINVAL;
517
518 q_data = get_q_data(f->type);
519
520 f->fmt.pix.width = q_data->width;
521 f->fmt.pix.height = q_data->height;
522 f->fmt.pix.field = q_data->field;
523 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
524
525 switch (q_data->fmt->fourcc) {
526 case V4L2_PIX_FMT_YUV420:
527 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
528 break;
529 case V4L2_PIX_FMT_YUYV:
530 default:
531 f->fmt.pix.bytesperline = q_data->width * 2;
532 }
533
534 f->fmt.pix.sizeimage = q_data->sizeimage;
535 f->fmt.pix.colorspace = ctx->colorspace;
536
537 return 0;
538 }
539
540 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
541 struct v4l2_format *f)
542 {
543 return vidioc_g_fmt(priv, f);
544 }
545
546 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
547 struct v4l2_format *f)
548 {
549 return vidioc_g_fmt(priv, f);
550 }
551
552 static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
553 {
554 switch (f->fmt.pix.pixelformat) {
555 case V4L2_PIX_FMT_YUV420:
556 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
557 break;
558 case V4L2_PIX_FMT_YUYV:
559 default:
560 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
561 }
562 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
563
564 return 0;
565 }
566
567 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
568 struct v4l2_format *f)
569 {
570 struct deinterlace_fmt *fmt;
571 struct deinterlace_ctx *ctx = priv;
572
573 fmt = find_format(f);
574 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
575 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
576
577 f->fmt.pix.colorspace = ctx->colorspace;
578
579 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
580 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
581 f->fmt.pix.field != V4L2_FIELD_NONE)
582 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
583
584 return vidioc_try_fmt(f, fmt);
585 }
586
587 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
588 struct v4l2_format *f)
589 {
590 struct deinterlace_fmt *fmt;
591
592 fmt = find_format(f);
593 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
594 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
595
596 if (!f->fmt.pix.colorspace)
597 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
598
599 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
600 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
601 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
602
603 return vidioc_try_fmt(f, fmt);
604 }
605
606 static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
607 {
608 struct deinterlace_q_data *q_data;
609 struct vb2_queue *vq;
610
611 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
612 if (!vq)
613 return -EINVAL;
614
615 q_data = get_q_data(f->type);
616 if (!q_data)
617 return -EINVAL;
618
619 if (vb2_is_busy(vq)) {
620 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
621 return -EBUSY;
622 }
623
624 q_data->fmt = find_format(f);
625 if (!q_data->fmt) {
626 v4l2_err(&ctx->dev->v4l2_dev,
627 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
628 f->type, f->fmt.pix.width, f->fmt.pix.height,
629 f->fmt.pix.pixelformat, f->fmt.pix.field);
630 return -EINVAL;
631 }
632
633 q_data->width = f->fmt.pix.width;
634 q_data->height = f->fmt.pix.height;
635 q_data->field = f->fmt.pix.field;
636
637 switch (f->fmt.pix.pixelformat) {
638 case V4L2_PIX_FMT_YUV420:
639 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
640 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
641 break;
642 case V4L2_PIX_FMT_YUYV:
643 default:
644 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
645 q_data->sizeimage = q_data->width * q_data->height * 2;
646 }
647
648 dprintk(ctx->dev,
649 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
650 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
651 q_data->field);
652
653 return 0;
654 }
655
656 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
657 struct v4l2_format *f)
658 {
659 int ret;
660
661 ret = vidioc_try_fmt_vid_cap(file, priv, f);
662 if (ret)
663 return ret;
664 return vidioc_s_fmt(priv, f);
665 }
666
667 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
668 struct v4l2_format *f)
669 {
670 struct deinterlace_ctx *ctx = priv;
671 int ret;
672
673 ret = vidioc_try_fmt_vid_out(file, priv, f);
674 if (ret)
675 return ret;
676
677 ret = vidioc_s_fmt(priv, f);
678 if (!ret)
679 ctx->colorspace = f->fmt.pix.colorspace;
680
681 return ret;
682 }
683
684 static int vidioc_reqbufs(struct file *file, void *priv,
685 struct v4l2_requestbuffers *reqbufs)
686 {
687 struct deinterlace_ctx *ctx = priv;
688
689 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
690 }
691
692 static int vidioc_querybuf(struct file *file, void *priv,
693 struct v4l2_buffer *buf)
694 {
695 struct deinterlace_ctx *ctx = priv;
696
697 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
698 }
699
700 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
701 {
702 struct deinterlace_ctx *ctx = priv;
703
704 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
705 }
706
707 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
708 {
709 struct deinterlace_ctx *ctx = priv;
710
711 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
712 }
713
714 static int vidioc_streamon(struct file *file, void *priv,
715 enum v4l2_buf_type type)
716 {
717 struct deinterlace_q_data *s_q_data, *d_q_data;
718 struct deinterlace_ctx *ctx = priv;
719
720 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
721 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
722
723 /* Check that src and dst queues have the same pix format */
724 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
725 v4l2_err(&ctx->dev->v4l2_dev,
726 "src and dst formats don't match.\n");
727 return -EINVAL;
728 }
729
730 /* Check that input and output deinterlacing types are compatible */
731 switch (s_q_data->field) {
732 case V4L2_FIELD_SEQ_BT:
733 if (d_q_data->field != V4L2_FIELD_NONE &&
734 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
735 v4l2_err(&ctx->dev->v4l2_dev,
736 "src and dst field conversion [(%d)->(%d)] not supported.\n",
737 s_q_data->field, d_q_data->field);
738 return -EINVAL;
739 }
740 break;
741 case V4L2_FIELD_SEQ_TB:
742 if (d_q_data->field != V4L2_FIELD_NONE &&
743 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
744 v4l2_err(&ctx->dev->v4l2_dev,
745 "src and dst field conversion [(%d)->(%d)] not supported.\n",
746 s_q_data->field, d_q_data->field);
747 return -EINVAL;
748 }
749 break;
750 default:
751 return -EINVAL;
752 }
753
754 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
755 }
756
757 static int vidioc_streamoff(struct file *file, void *priv,
758 enum v4l2_buf_type type)
759 {
760 struct deinterlace_ctx *ctx = priv;
761
762 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
763 }
764
765 static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
766 .vidioc_querycap = vidioc_querycap,
767
768 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
769 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
770 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
771 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
772
773 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
774 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
775 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
776 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
777
778 .vidioc_reqbufs = vidioc_reqbufs,
779 .vidioc_querybuf = vidioc_querybuf,
780
781 .vidioc_qbuf = vidioc_qbuf,
782 .vidioc_dqbuf = vidioc_dqbuf,
783
784 .vidioc_streamon = vidioc_streamon,
785 .vidioc_streamoff = vidioc_streamoff,
786 };
787
788
789 /*
790 * Queue operations
791 */
792 struct vb2_dc_conf {
793 struct device *dev;
794 };
795
796 static int deinterlace_queue_setup(struct vb2_queue *vq,
797 const struct v4l2_format *fmt,
798 unsigned int *nbuffers, unsigned int *nplanes,
799 unsigned int sizes[], void *alloc_ctxs[])
800 {
801 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
802 struct deinterlace_q_data *q_data;
803 unsigned int size, count = *nbuffers;
804
805 q_data = get_q_data(vq->type);
806
807 switch (q_data->fmt->fourcc) {
808 case V4L2_PIX_FMT_YUV420:
809 size = q_data->width * q_data->height * 3 / 2;
810 break;
811 case V4L2_PIX_FMT_YUYV:
812 default:
813 size = q_data->width * q_data->height * 2;
814 }
815
816 *nplanes = 1;
817 *nbuffers = count;
818 sizes[0] = size;
819
820 alloc_ctxs[0] = ctx->dev->alloc_ctx;
821
822 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
823
824 return 0;
825 }
826
827 static int deinterlace_buf_prepare(struct vb2_buffer *vb)
828 {
829 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
830 struct deinterlace_q_data *q_data;
831
832 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
833
834 q_data = get_q_data(vb->vb2_queue->type);
835
836 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
837 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
838 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
839 return -EINVAL;
840 }
841
842 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
843
844 return 0;
845 }
846
847 static void deinterlace_buf_queue(struct vb2_buffer *vb)
848 {
849 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
850 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
851 }
852
853 static struct vb2_ops deinterlace_qops = {
854 .queue_setup = deinterlace_queue_setup,
855 .buf_prepare = deinterlace_buf_prepare,
856 .buf_queue = deinterlace_buf_queue,
857 };
858
859 static int queue_init(void *priv, struct vb2_queue *src_vq,
860 struct vb2_queue *dst_vq)
861 {
862 struct deinterlace_ctx *ctx = priv;
863 int ret;
864
865 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
866 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
867 src_vq->drv_priv = ctx;
868 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
869 src_vq->ops = &deinterlace_qops;
870 src_vq->mem_ops = &vb2_dma_contig_memops;
871 src_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
872 q_data[V4L2_M2M_SRC].fmt = &formats[0];
873 q_data[V4L2_M2M_SRC].width = 640;
874 q_data[V4L2_M2M_SRC].height = 480;
875 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
876 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
877
878 ret = vb2_queue_init(src_vq);
879 if (ret)
880 return ret;
881
882 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
883 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
884 dst_vq->drv_priv = ctx;
885 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
886 dst_vq->ops = &deinterlace_qops;
887 dst_vq->mem_ops = &vb2_dma_contig_memops;
888 dst_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
889 q_data[V4L2_M2M_DST].fmt = &formats[0];
890 q_data[V4L2_M2M_DST].width = 640;
891 q_data[V4L2_M2M_DST].height = 480;
892 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
893 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
894
895 return vb2_queue_init(dst_vq);
896 }
897
898 /*
899 * File operations
900 */
901 static int deinterlace_open(struct file *file)
902 {
903 struct deinterlace_dev *pcdev = video_drvdata(file);
904 struct deinterlace_ctx *ctx = NULL;
905
906 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
907 if (!ctx)
908 return -ENOMEM;
909
910 file->private_data = ctx;
911 ctx->dev = pcdev;
912
913 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
914 if (IS_ERR(ctx->m2m_ctx)) {
915 int ret = PTR_ERR(ctx->m2m_ctx);
916
917 kfree(ctx);
918 return ret;
919 }
920
921 ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) +
922 sizeof(struct data_chunk), GFP_KERNEL);
923 if (!ctx->xt) {
924 kfree(ctx);
925 return -ENOMEM;
926 }
927
928 ctx->colorspace = V4L2_COLORSPACE_REC709;
929
930 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
931
932 return 0;
933 }
934
935 static int deinterlace_release(struct file *file)
936 {
937 struct deinterlace_dev *pcdev = video_drvdata(file);
938 struct deinterlace_ctx *ctx = file->private_data;
939
940 dprintk(pcdev, "Releasing instance %p\n", ctx);
941
942 v4l2_m2m_ctx_release(ctx->m2m_ctx);
943 kfree(ctx->xt);
944 kfree(ctx);
945
946 return 0;
947 }
948
949 static unsigned int deinterlace_poll(struct file *file,
950 struct poll_table_struct *wait)
951 {
952 struct deinterlace_ctx *ctx = file->private_data;
953 int ret;
954
955 deinterlace_lock(ctx);
956 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
957 deinterlace_unlock(ctx);
958
959 return ret;
960 }
961
962 static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
963 {
964 struct deinterlace_ctx *ctx = file->private_data;
965
966 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
967 }
968
969 static const struct v4l2_file_operations deinterlace_fops = {
970 .owner = THIS_MODULE,
971 .open = deinterlace_open,
972 .release = deinterlace_release,
973 .poll = deinterlace_poll,
974 .unlocked_ioctl = video_ioctl2,
975 .mmap = deinterlace_mmap,
976 };
977
978 static struct video_device deinterlace_videodev = {
979 .name = MEM2MEM_NAME,
980 .fops = &deinterlace_fops,
981 .ioctl_ops = &deinterlace_ioctl_ops,
982 .minor = -1,
983 .release = video_device_release,
984 .vfl_dir = VFL_DIR_M2M,
985 };
986
987 static struct v4l2_m2m_ops m2m_ops = {
988 .device_run = deinterlace_device_run,
989 .job_ready = deinterlace_job_ready,
990 .job_abort = deinterlace_job_abort,
991 .lock = deinterlace_lock,
992 .unlock = deinterlace_unlock,
993 };
994
995 static int deinterlace_probe(struct platform_device *pdev)
996 {
997 struct deinterlace_dev *pcdev;
998 struct video_device *vfd;
999 dma_cap_mask_t mask;
1000 int ret = 0;
1001
1002 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
1003 if (!pcdev)
1004 return -ENOMEM;
1005
1006 spin_lock_init(&pcdev->irqlock);
1007
1008 dma_cap_zero(mask);
1009 dma_cap_set(DMA_INTERLEAVE, mask);
1010 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
1011 if (!pcdev->dma_chan)
1012 goto free_dev;
1013
1014 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1015 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
1016 goto rel_dma;
1017 }
1018
1019 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
1020 if (ret)
1021 goto rel_dma;
1022
1023 atomic_set(&pcdev->busy, 0);
1024 mutex_init(&pcdev->dev_mutex);
1025
1026 vfd = video_device_alloc();
1027 if (!vfd) {
1028 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
1029 ret = -ENOMEM;
1030 goto unreg_dev;
1031 }
1032
1033 *vfd = deinterlace_videodev;
1034 vfd->lock = &pcdev->dev_mutex;
1035 vfd->v4l2_dev = &pcdev->v4l2_dev;
1036
1037 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1038 if (ret) {
1039 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
1040 goto rel_vdev;
1041 }
1042
1043 video_set_drvdata(vfd, pcdev);
1044 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1045 pcdev->vfd = vfd;
1046 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
1047 " Device registered as /dev/video%d\n", vfd->num);
1048
1049 platform_set_drvdata(pdev, pcdev);
1050
1051 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1052 if (IS_ERR(pcdev->alloc_ctx)) {
1053 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
1054 ret = PTR_ERR(pcdev->alloc_ctx);
1055 goto err_ctx;
1056 }
1057
1058 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1059 if (IS_ERR(pcdev->m2m_dev)) {
1060 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
1061 ret = PTR_ERR(pcdev->m2m_dev);
1062 goto err_m2m;
1063 }
1064
1065 return 0;
1066
1067 v4l2_m2m_release(pcdev->m2m_dev);
1068 err_m2m:
1069 video_unregister_device(pcdev->vfd);
1070 err_ctx:
1071 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1072 rel_vdev:
1073 video_device_release(vfd);
1074 unreg_dev:
1075 v4l2_device_unregister(&pcdev->v4l2_dev);
1076 rel_dma:
1077 dma_release_channel(pcdev->dma_chan);
1078 free_dev:
1079 kfree(pcdev);
1080
1081 return ret;
1082 }
1083
1084 static int deinterlace_remove(struct platform_device *pdev)
1085 {
1086 struct deinterlace_dev *pcdev = platform_get_drvdata(pdev);
1087
1088 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1089 v4l2_m2m_release(pcdev->m2m_dev);
1090 video_unregister_device(pcdev->vfd);
1091 v4l2_device_unregister(&pcdev->v4l2_dev);
1092 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1093 dma_release_channel(pcdev->dma_chan);
1094 kfree(pcdev);
1095
1096 return 0;
1097 }
1098
1099 static struct platform_driver deinterlace_pdrv = {
1100 .probe = deinterlace_probe,
1101 .remove = deinterlace_remove,
1102 .driver = {
1103 .name = MEM2MEM_NAME,
1104 .owner = THIS_MODULE,
1105 },
1106 };
1107 module_platform_driver(deinterlace_pdrv);
1108
Linux with added FPC-III support